Production of alcohols from halogenated aldehydes



Patented Feb. 9, 1926.

UNITED STATES PATENT OFFICE.

HANS MEEBWEIN, OF KONIGSBERG, GERMANY, .ASSIGNOR. T O FARBENFABRIKENVOBM. FRIEDR. BAYER AND (30., OF LEVERKUSEN, NEAR COLOGNE-ON-THE-RH-INE,

GERMANY.

PRODUCTION OF ALCOHOLS FROM HALOGENATED ALDEHYDES.

No Drawing.

To all whom itmay concern:

Be it known that I, HANS MEERWEIN, a citizen of Germany, residing atKonigsberg, State of, Prussia, Germany, have invented new and usefulImprovements in the Production of Alcohols from Halogenated Aldehydes,of which the following is a specification. 7

My invention relates to a valuable improvement in the manufacture'andproduc-- tion of alcohols from halogenated aldehydes.

The new process consists in treating halogenated aldehydes dissolved inprimary alcohols with alcoholates or halogenated alco hola-tes ofaluminum or mixtures thereof.

In order to illustrate my new process more fully, the following exampleis given 150 grams of butylcliloral'C-H -CHCl CCl -CHO are dissolved in400 cubic centimeters of ethylalcohol. 45 grams of molten aluminumethylate are added and the mixture is heated to boiling in a-vesselprovided with a reflux condenser while a current of nitrogen or hydrogenis led through the vessel. The vessel is immersed in a bath heated to135 C. When the development of acetaldehyde ceases (after about 1 hours)the ethylalcohol is distilled off (temperature of the bath up-to 120(3.), the residue is Application filed Kay 28; 1925. Serial No. 33,505.

acidulated with 150 cubic centimeters of 30 2N sulfuric acid anddistilled with steam. The trichlorobutylalcohol CI-I CHCl C(ll CH -OHsolidifies'iii the cooler. It melts at 62 C. Y i The reaction proceedsaccording to the following equation:

.gen'ated aldehydes dissolved in primary al:

eohols with halogenated alcoholates of. aluminum. In testimony whereof Ihave hereunto set my hand.

HANS MEERXVEIN.

